Expansion joint for concrete work



y D1,643 257 Sept. 20, 1927. T. RAUSCHENBACH l g EXPANSION JOINT FOR CONCRETE WORK Filed Feb. 1*.6. '1926 IIIIIIIIII Patented Sept. 20,1927.

THEODORE RAUSCHENBACH, 0F EvANsvrLLE, INDIANA.-

EXPANSION JOINT FOR CONCRETE WORK. j

Application lcd February 16, 1926. Serial No. 88,585'.

In laying concrete work, the common practice is to insert a metal partition between adjoining sections of the concrete which is molded in or between suitable forms. Vhen the work is completed and the concrete is dry and hard, these plates or partitions have to be removed and this sometimes results in considerable injury to the work by causing the concrete to crack, necessitating reworking the job.

The object of my invention is to provide an expansion joint of improved construction whichmay be left in position between the adjoining sections of concrete when they have hardened and become dry and which, by reason of its resiliency or adaptation for expansion and contraction, will provide a permanent joint and does not have to be removed.

My improved expansion joint, being a permanent part of the work, no defect 'in the work is brought about through removal of the joint and, because the joint has adaptability to expand and contract, the concrete work is not injured because of the fact that the joint is left in position.

I have discovered that corrugated paper or paper board dipped in fluid asphalt and having its cells, openings, or interior filled solid with such asphalt, is well adapted to serve the purpose o f the present invent-ion. In practice Ythe joint is of a thickness of say, from one-quarter to one-half inch, and of a height, width, and shape suitable to the work with which it is used.

While the invention is shown in the drawings, and hereinafter described in connection with a curb and gutter for a street, it is to be understood that the joint may be used at any point where concrete work is laid and regardless of the nature of the work or its shape or contour.

In the drawings:

Figure l is a side elevation of an eXpansion joint made according to my invention, shaped for use in connection with curb and gutter concrete work;

Figure 2 is an enlarged top edge View thereof, broken away at the left hand end;

Figure. 3 is a side elevation showing the joint in position in connection with the moldboards for concrete work; and

Figure 4l is a plan View of a section of molded curb and sion oint in position between the adjacent ends thereof. yy My expansion joint is of cellular or open construction, preferably being made from a sheet of corrugated paper or paper board such as is well known to commerce. The joint is cut or shaped to give it a contour adapting it to the particular mold of concrete work with which it is to be used and it is to be understood, therefore, that the shape siown in Figure l is illustrative and not a limitation of the scope of the invention.

The joint l is dipped in liquid asphalt which then coats the exterior of said joint and also lills the spaces, cells, or interior between the side walls 3, as shown at 4. Vhile not given a distinctive appearance in Figure l, for instance, nevertheless the eX- terior ofthe joint is coated with asphalt, resulting from the dipping heretofore set forth. The entire interior of the joint is filled with the asphaltic material 4.

In Figures 3 and 4 I have shown how the joint may be used in connection with a curb or gutter concrete construction. The ordinary mold-boards are shown at 5. The

molded concrete appears at 6 and the cinder i or bed construction is shown at 7. The

space between the adjacent molded concrete sections appears at 8.

It has been a common practice to use metal partitions in the space 8, the concrete gutter showingmy expan- 151150111111ce.i,v

being molded up to these partitions. When l the work is finished the metal partitions are removed. This frequently results in damage to the concrete, 4cracking` thereof, etc.

My invention does away with these disadvantages and instead of using the ordinary metal partitions, I pro-vide my improved expansion joint appearing in detail in Figures l and 2.

Before the concrete is poured, the joints l are inserted at the proper points. The concrete is then poured and finished and allowed to harden. The expansion joint remains in position as a permanent part of the work. Due to the flexibility, compressibility and veX- pansibility ofthe joint I have provided, it will permit the necessary contraction and eX- pansion of the concrete work and will accommodate itself to such action. Being coated outside with asphalt and containing that material, the joint Withstands the action of the elements as Well as Wear and tear.

What I claim is: 1. A joint for concrete Work comprising a' sheet having internal cells, said lsheet being coated on its exterior and provided With an internal compressible filler which com-` pletely fills the cells thereof.

2. A joint for concrete Work comprising a sheet of paper board having Hat outside Walls and a Cellular interior, and an internal asphaltic filler which completely lls the cellular interior, the exterior of said sheet being coated with asphalt. `15

3. A joint for concrete Work comprising a sheet of corrugated paperboard having flat outside Walls and an internal corrugated piece, said sheet being exteriorly coated With asphalt and having a filling of asphalt which 20 i completely fills the cellular interior of said sheet.

In testimony whereof I aiiix my signature.

THEODORE RAUSCHENBACH. 

